Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '912f397ac301d2d00787c053cd1a289ef8b2c1dcaa7bbdf5b0267ba1dafa8080' 
  AND token = 'LnVr9JwnSuAobpquv3kXgI0NLa5TMeDE0BM0BC0YKeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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