Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a02b89f5ac9743729b0c3fbbb944439aa893d5edbd02dddd75aa2f3fcd1b45ac' 
  AND token = 'Vt6GkPDRUQvj/WEvdpqCmRNoCbSaKtYb7VXLmUcXKYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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