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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e9117a9eba3a93b8c2daa376b5c6119475caa21f913fea6662c6965b7ecfc45' 
  AND token = 'XEU0iR0oyC5k3AfGDKv4UTARKPUjuK6i186zYhPzV0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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