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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bcb99e3bf577fc8b3a51bac59beb428adba841d83d0ee12dc9f587e54447e9c2' 
  AND token = 'tdw9LTs0QMOZo987e/S0FeG3omkv2B7pq8PUFGuwBk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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