Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ab73f4272c27b0a38e06fadeaa2db4e588830727fbae5b4c14668e559ce6231e' 
  AND token = 'ASNn7ULpAugKHgzccCr+UdguNm9BY64Q4qDnk4wpYIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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