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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ca733a360c4928ae9ca2234ee5cf68d025cb0e7c699d783dc50ad2a0ee75749' 
  AND token = '4W9Vt8UdvKmfE14GtN0KZQRHhyKpidO5C5NiHQWtmzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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