Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed84342e83f13f9350a721ff4ef237125a630a3be1d2077589ca9ccaba2f654d' 
  AND token = '2i5nU37zx5pcXgl8US21axK/HpOeRE30OOb2cLZ/c6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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