Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b55ddbb77e7dbf43fa06ebe9862cccdf987cbdc51aa2c32c5c6ef079c91c3c1' 
  AND token = '7WGMXEicCxXZAlWtIw4I/lzQFed9GutuygHYnONMRVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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