Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6b95c74d324fd3c3b5f0710f96ba328d89507a0f5ad1ed5b6056cc14f23baf4' 
  AND token = 'uF7ehgU0GhG8vA4koalUjcRM4WvEub92T3HbMGhQvl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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