Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '71a97945909e3e62b3728051b4af27381e2fc5a3c77799ae18d11d0e88d84cbf' 
  AND token = 'laGtz2wwu6PIUsNvc98MZNOIGhUfAFqhq1u3Tvz1CeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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