SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c0ffc52b7152b62ff9b2d6f0c7f40df5dea82eb9ea6f189487a2ca1c72c4724' 
  AND token = '1aTcB+w/LwPGBJEovHqtWXadS3gwHzD8xRTzl2+QWcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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