Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7f35f5fe8fd85839a2a952b2c5c66f844f310721497cc0ff11cea8bd04d6eb5' 
  AND token = 'VMfd2cuurYphkzVkIan4BXWv6/7oIxnyPM9pSAPW7bc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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