SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c84a1b911d4ca90cf28ee083735e5669168372af2c8789fb370eba16c4bd5902' 
  AND token = 'cZqQZS34jxKJG/N0d34J4Zt+5WXPYxWo+XYer4CJ/UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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