SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '964393612186c4020634815af64d2254367c3f74c23124d05aabeb669562185c' 
  AND token = 'qHvXtQmxV0aQK/nHTwmO9hIgLmnJA0TzTkg4MawOa4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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