Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f0e2cae6dd5fc5ded6205b34018ada18d90f07c8dd78ee49875f3e9d24a00cc' 
  AND token = '2NY/bBvk6edx3LwYWOQD8uCWjaSaPFb1aeXtsQcE5wo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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