Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1a60fbe6f0fd34f0825842b67c4d251113929dbe5c0ddffb57ade88ab543f03' 
  AND token = 'J3x1RATRnW57wtTaynSugGfToRhf6S4sLn3iJcuE+QA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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