Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ee8ee5e7f3e675bb7f7157e89cc34365a77090f81b40a6d0f697ea68b1d5dcf' 
  AND token = '8gdAI1M1MHTclYMToV5eP3vGamrXxPCyqmLgg60IsHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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