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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daabfb74f13fb97eaf67421a2051561d1beacbf837f530ff5d94f6caa3fbabea' 
  AND token = 'ehnHP5/cl26bm0G18FUmPs1fdwq07H/x9J7SyZ1Z768=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}