SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f43da90ff37c460782c741a06a9ec0a35279b40865665143e69bafd4954154e8' 
  AND token = '+UlI2ffZcVhM/qYxEDqfT1k7z5qsI8rcVH4KvB/yErI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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