Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '971863d95641547c69825438315875dfd5e6538f5772973350380c961ce95762' 
  AND token = 'r/QZeQ7YwGPnX7lJd9Gt6T9m6JTJbJVBMJE69S3riaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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