Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eab7d5831b01d6fbeced758b17d6cbfe997f565cb9c5055b08ed7e498acba6f1' 
  AND token = 'EZR2xjTohIMWSDkn8lWuHwVMFnlgJf09OmNIM1/Csgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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