Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e5be1fccf26f8c1cf469aeb2bfda86f9c2f3290bf2b5b7d26d60abf3b748635' 
  AND token = 'FN9+M9L8eHpFe0vpNk1Ds947uL9IsnRdpt7w6dvrXd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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