Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35add09ce5f47aea8a47e677a0ccadac25454a1e79132a1822599ec26e49ac62' 
  AND token = 'JGwbX3ipPVgPmxTC37eMHuOFBB+DHNukmrHqRfQBCo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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