SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc114cec34f18e9008a17239e8fd1d943fdc0476ae85b47f1a0913f93d2b0c25' 
  AND token = 'rR9h1glS2DFzAlNnevM+BtPbZjrGWiwb15NZMA6FtDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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