SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06469af8e23e031f4a158146e5ef54ad0341b40ef35275f691b0c596660c3d2a' 
  AND token = 'CjikvgrpCMgK+p792LRvp2GwUZMtIjJx7KKxwVZcQ6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}