Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae19717f4ad7c362ae732f90ab8ce0192c12dbd7873cdaa6e376c18c4e76c55f' 
  AND token = 'F2MsbnOuOwkxRmUdbE62aFLJ7OX37c+ZBJ9JVXQN+NU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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