Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16e21d8f05807f0a1b48af82e63744108ca3c3a1d79a2fc6c27db089747cff41' 
  AND token = 'CW/ZpOkO3Hx5Bzx2djotV3fuhkHhfwE5HWW2up2D3jc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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