Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '637436258551a7cb185b19889d8c0a79fe1c57e8e85cf647be3a26a418c53850' 
  AND token = 'Na8djBz9NSKdhXnBYH3weRxvGsojsaugn0SL89RVYM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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