Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56c62f9109af9d046113ddf693554caaaecf49b369e3f64906b937d56e0b25cb' 
  AND token = 'gf0SXrsgp5zAmxHwzQMoZl6MZ0DWtifVfWz3Km68lFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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