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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01490dd5a4b1d83236429267e4a63979ae0a4ce433a4e7dc1c8b444bdba863ac' 
  AND token = 'cefcsbbCP58/K1CMlFw68IygqIOJes2zipBWo9NQ1/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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