SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d7159a2b4eae11edf8cf5416009d6fc9f545886cb40a8c51feaac34dcc09574' 
  AND token = 'MM+glHDjbjdOzgK/zwq5iCyDY+Q2rif4G23khI0oLLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00104

JSON explain

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