Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d5518f5dcbde0dd5ee6da71855737ccc532e8cfdcb656717aba2d65e4463555' 
  AND token = '2zA7z6Y/oIMgpT16TMev61aPZ3Fpkxb3NDRdSxRujVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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