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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9f9488da42b95ecb5a5f34505aa8cedfdd16222ed1afc4cc3bb4124f7c5d133' 
  AND token = '5YfaOhGWdFWZj9BCQT8XewgRBBCN70iSfZCEk1j4K1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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