Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb16d9e24b3805804b1257385eb17a315f4bf71992c642c7a1e6a66c07e5cb11' 
  AND token = 'G8Yv4/9JIM9mu4f39/bEQ8nN3kf2UebVAfZ6f+iGurU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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