Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e64a30d20b11baac12ce2152cb681aafde65f634c5bd8553ef3dfdbef086237' 
  AND token = 'riDN6ZEwAVMJiDjj/NreEEejS0OSGSXTjiKvFNMsRW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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