Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c08730e1c038c49344429b0021838774740067ca652f5ae20e2dae31f99674e8' 
  AND token = 'bwB7YchVU7QLf9UurftPG1aK4+ie5I10kArmJ9eERk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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