Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39ce62b4837f4f87484f709cf5d0c64b93a3f17ce634e17f6930eee354b279b3' 
  AND token = 'CYd+53++YDXascr3VzwUqanyyiuF+bH3NCVRQQoRanE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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