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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a23f90b02894892cd51dd9c2afdb2312ebe9e247f7d447669c2913040acef63f' 
  AND token = 'UjEEbEipalWccO/1JdXvRuGnVZ8Jrk5im3vP4ul3tQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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