Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bc3d93b5f38cc0c3a3691db4c39afdd3a246421120a91212d4c698c1e9deedd' 
  AND token = 'Hg1L2EHFlwFBHr4YAohM3wF2AmV83M4yEb0NdfK9ZNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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