SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e774fa677b65d0e4830892d7eb597c0a6f6ee471dc331b8ee35df01a2c9010a' 
  AND token = 'agaPBNgmuA0qiHxE9prKvGPCFJsJCzWNZdGSMt1FjeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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