SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86c15324939d40efeb678929dab17ad70a2bcece20732f4450ddf9e66e35cd9b' 
  AND token = 'Y3VbTgDo6zL1QGs8YW7LHCLSvzEE4/aEafxbFVXDKuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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