Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17566933bde0915a64d0e71336dd6cc189e100869f5bbcb22cb5ac05f914fd59' 
  AND token = '1A9i5HF6MkjBBxdh/xuuP8+unsrqqmDy1OHFfDyNm8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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