Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab5a2dd27cb14d80922e9e3a032135c9f8f52eab86246cc49e58c3e29b7ec706' 
  AND token = 'h84DUkFSs3WpJn6MHSmUvVYKtpJNFeX29dpRsmL6EgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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