Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ccf2071ce8caebbf4a4721b5e4a41779006bab9aff06a17a2bb3e29007a1ab3' 
  AND token = 'FDoaE7OLRP4Rg5BHloWNfDWTF5UasTo/pdCWpdPgd0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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