Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9557f5d1ca9f1ec329676ef185e1e2a23c60221262a680e07a9296b77a455a2' 
  AND token = 'o8Bk39UDCtbDKcZnJTK9QqxtQ661WMDRuJXq5SKroBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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