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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eeeda8704477c24b75322f53a55f136245689d9197f409b5d35d0c7351fff502' 
  AND token = 'AdhCh492RWow3o7N945qxoMGkSvphyZfL/1vJ0XhvZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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