SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8022081aeda930b37f9c51c7752735183c87307ba9f8e2dd54daeac428895760' 
  AND token = 'g+/9aHZvF+0FsGTCVrbWLpY1o+WsHaJeVTGOhhX4TUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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