Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6354e971a138a84b0b2882e659d6921898bfb801c7466b914e8610bc6f8d453' 
  AND token = 'SG+DDc+tIj/ubvUw1SPX912bLPOIpFzujKKW9/IsORo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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