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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132c36a1335e302a7ff9eb88aa6afdb731c438badeb443b0d35c18ce67655857' 
  AND token = '178ySI4CbQe+f/cNgeOkHd99PHrX11fvVBJaEF2sOio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}