Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc596b6d42ebe0d1d05b25e5d5bb94b1e70e6c1b97a25065f66940586ed0428a' 
  AND token = 'Ju/VLjcal8Uykc9R0fbuBRXcBZnk7DY86yH9i6x5bfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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