Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '400cef9a3c16f3ff8b2d16ed0555c47c6780b6f388860cf79e0f42f04bfe53f6' 
  AND token = 'cUxCyDCB/bHLGNe4xJcl4aR77nHIVevR/Sw2fwXXSHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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