Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b8f165901f2c3c9ff07cd3eea2d97be4f1724cf89db066f18d1b2d2b2794c36' 
  AND token = '8Kh3fYO6skUROS96WSC3VKTxaeSB+GBLGjGjUGGCiPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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