Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd343c19d4cf0f5c638d224b0f618474cafa112dd27f2fb8f10ce7758ffe5dce8' 
  AND token = 'ct9yWwTLfJ025reSmCKs6k+EQ4BA7kawMS6eSWGYvcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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