Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86e4c1e805a49e85a418784c895357b437d208748c68e47b3b809441b7009a43' 
  AND token = 'BNeNqjuFhLyNDa8qMJcKQOrtApOQBpyBVo6KYM9Yfv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}