Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a257ddb9780bf2d2694e252af0f61de1d7633e0b7ecc7a1a97793ab389664de' 
  AND token = 'HUAsCr1CaQH+DmmPKymbWBPLKJSbneUvWKdAHlYF++U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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