Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4dd130a6844f6a533025b9420b1d97cb67a69eec8ff1d6b99749c8e7ebbea86' 
  AND token = 'u68gyVN2tzHI07mFeZQjG8x6ivfn5XwH/tOok0ZepPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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