Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0adca39c05885903d7937a7866ae58c80235bacecf21a0d2d287ec8063ec81f' 
  AND token = 'arMl8mDAQolay87HSvlyAqh9bs14BYbt4Xd7x0FtVX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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