Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4299cf6f08ff66020dd144273060f7e8d25e19e9ecf6f5d87c92089045a77f26' 
  AND token = 'XIfTFgP5kz8TyCaHhs6fe7emKeUkBs++gMxVK/eDQH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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