Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6440b851a45a104bca7fcadc77bad646d75dfd5a8cc2ea8a79878c0e5dd317c4' 
  AND token = 'f14FbSl6Lp02r+lJN1NITayyKPlCgbCzHIPcs2e0T+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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