Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47e8ea8ac737661de6e9e3a485e13fe9d0b775c1d98eab7bc066096a7b4be2d0' 
  AND token = 'HUAdqE141kUtc+MTfVYpPGkKI6VOM/o/3hHEBolmFO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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