Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f3d99be23ffc617f1141d7a2e9dc65e5d839380509f23e76d700ca43d1d2eb4' 
  AND token = 'PI8b5s5WNm48QLk6tdrRq1ZZTadg1J18m/slhRJsTm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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