Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c5b6718adc1fed14b5492fbe2ffdc8949fef06e45440bff925a3a4e2853734a' 
  AND token = '0drPYBWXuKCU6XPpzIiQltht+BFufoCqpPM5PfEflRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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