Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9538abe4cbb8e919afabf10b63e314af1954a2665cf68de8abbc0baad80fbbef' 
  AND token = '36pUy+mpFOEaH4Jk/igV7/pINFaO+YYNfbgppU1uxTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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