Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9a87e9733b3c359a42cebd6e81d3749f30287f98004b9eaac91fa53ab76dae4' 
  AND token = '9EGieQyz4+fEmp96bSdLk2i89wp8X0ACxhacf3CfabE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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