Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a065c1b3d8a90195f9fae138bceccc79693a572266b0cd5cc9306efe1b284585' 
  AND token = 'NQqzB3unOEpKNWtnmo57spF26vTCggNIUAPfd53rp98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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