Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4da6f7d1163e2a1a29698cf667e26083e7bd9d6b4b8926974455c89bc52345a2' 
  AND token = 'gFg+3FPA4IbGOlTfe3RV33g2jAHF3BTgRNCt9EAj6yI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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