Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ff1a5d97c89c2b2345488fcf0e8ba72bd149e58d7d6f9b0b2f941a58a4c6eef' 
  AND token = 'IQfSd4CVyEUC+N0CY5NeNWWH++xBz8dn43P7A3gXLmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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