Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7522a493c80e684cc99567ea4662b3ceed4304c334f166b69da80efe3b146b1' 
  AND token = '4deDdoLySI2ixgDdzesFYyT8YNv0SfdU5S3W9e1MgXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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