Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '023601c10be17a16cc60c4c850d909cc00fa10a6dcb4e6dd92cdcf2cacb8d22d' 
  AND token = 'xWp2iiQGEpfyJAKutYfhdFDwVsBPwwFjXMg2lL9+k3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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