Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f88d2e442b0b3c35ca8a85d7bf6425e60c582d5066d56a57616fbf35b2ea8024' 
  AND token = 'uo6leVN1/Rim67itt1h8y+lz6sMvRQLYjyHHdh5pQqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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