Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e7eeb76cec1166b75bc64dd8382d6bbc460c8c576af3e060ab2cd871f814571' 
  AND token = 'UkepPZf13dcmKt5+3UMzSqA/gjkxT8N8fVp+ZyPQEno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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