Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ee4db75f9f482828827d2afd193eccb2590d4899479dfb533cf6f0ff207f71' 
  AND token = '93fcw4r7QhI9zyMh4y+kk85LI7LAYvN/JqkDEQPEsIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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