Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c1afd79b2a1ef81d87b573c56343659d4aa690c448fcb130df1cd679c5e76d6' 
  AND token = 'e1TySIzG7dCizcUPddxzH0HYa5bBUWeKwO4Lh1jdnX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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