Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5827b817eb2620f7fcc1cfc6cdaf8c2971311a219261197c27dedab4d7e0d54e' 
  AND token = 'Lqz9ycMax9/cml3Raf5gcxpYyEbckeFC1cuU4IOkCXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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