Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8502b05796c6fa41ddef45d57406ce1420b19d300cb5353d1edfbd486a28eb' 
  AND token = 'Q36gkbVtIuYK/rketROvf1m+XNveMc2ZY8czfnTYRTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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