SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '460b5419630cdd4c4dca0d99702353492bcd249b3d036488bde248ad1b86772b' 
  AND token = 'BXRoWDZ6xR4uVZrFlhNwzhjlP0W/sVGuVh1Sl5YcwUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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