Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cdc06361f82756eda273de6808a935733ae8f5efb8ad14b4b067b98b888a7ab' 
  AND token = 'SqzAITdcV+JTMcTnW6U6s/uapeGfv4iCyKi/HhkwvdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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