Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebc2e8a0eae4fa82b425923f8adb4294421c9df5c42ccfef3e06ffc1634b8b51' 
  AND token = 'gWoNdTQRGqM03gbyR5ghpQck53PQ6EupuusTZQoQ26k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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