Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee18130721d0e4a28b50bbdc7cdcfa058807ea97f3ebf4e4c98abcc61b25eb74' 
  AND token = '3oEv5oT1iqNTZdoFKssQ9D3Xbm18GxNlN+weDO1Wgq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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