Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5028e82ccca727cb206aae51684e019e8996edc1b01efc795e440366798eaaf' 
  AND token = 'RzgCP9a51W6xBC/raoaxT0dCKhx1T7I7uu0OvVx0vh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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