Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d51e14fce31d37f5802e1245f7c1ceb043b105a4defff8caabf9b0120b3f2fa' 
  AND token = 'oMiLLF6YYpQpVRiwkLOOicll46WuUGlr/BPeu0MjMgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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