Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de455259fbeeecfd91e3209ad5025a47706814aaa977b5912063c2d8d31834e5' 
  AND token = 'gF11sEt4WZMV//ZWGt1C0jUGSCQsTvrYA7M7MC5G1e8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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