Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25d40d383e33eff4d0b16ac5cf674a99b780071cc3f0c76cf38b2643e35fa243' 
  AND token = 'aifW7x3TtIlROr1YTbQlYqPX324E19pvqmZ2TxFgd1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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