Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fecccbaff40bfc10c260068f4f1aa89c8cb31dbe819dd2bb23eeaae760b5d1e' 
  AND token = 'nc4VaPJmvb2Hx/ELYQpdM07IbM2zK/ivyiQcsKm4aJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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