Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '766892f9697fc1ed74e5b1c2a5d15c7098cdaca4508afaca7e550c26e89e6c14' 
  AND token = '9Fgb1q1LNOsiP7K8usR78vUJNiXH3iIgSiGhgVNf2rI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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