Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '432c99fd8ae0290805a195f0490d6f7fda49f577a22469122727b94eb1f84fe0' 
  AND token = 'XEE1wuVZ7SqfwsHcvi58y7rEnUzgEKLMPjnDAkgOBfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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