SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd90f4583355f2e9023cc8473a02a90b1ac50ab80b4deca96b68174359580463d' 
  AND token = 'yvY+vOuYXBulSJDPGWHXN4yG3JJLyJ1L5/gmld/8zBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00162

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}