Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f008cff020edf64b21f2e5d9cb2865f16ccb49aa5f00871819d8d24c1fc19c7' 
  AND token = 'mYvEZrcsXcTAy5plAVM4jMG8bVw/3gG0dCw+6tqEGxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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