Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfdbd6e802946477b0b026605277f19c5bd6e15bee747c425b8c8d89700dda10' 
  AND token = 'KFJQ3NVyR4XBjRv8fxMHk869V21R6bgjmBTDndTLkOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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