Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de63f2e15333431a1cf85cad635f18689240f6feb51858e0a61edcdf95c617b4' 
  AND token = 'mLS7bNbkt8ftyX84CpeYVUmQgB+O2B+F7CS8jlxPBd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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