Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75ea89a1aed9d41db744f0e4c1f601ce94185c908f26aea7d3ec2684f7648f08' 
  AND token = '5oS766kBXWRyWrfy0vSmILxgdIUttfRKAfrpjrf+Qds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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