Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34a60788d03352a79f3f8c60b0ae38cb65db78f8afc257bf78f904ce094fcfa8' 
  AND token = 'jlSASCKneFBEKs9ueFC4bQPpQgdUeVk7LQivuIc5NWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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