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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1620193428d0e926a7fa83dbc1e68e3c98fa01af15a5cb6f29c466061ed4b8e' 
  AND token = 'YvzldR4Y/U8t54f/etoP8SKDD3UbUgMbVFijQ6O9TRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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