Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85fee4b75a5679204c74c02a988914fbbb1aedb4653c7dc0bcbf77c0ac86a59a' 
  AND token = 'Xh21jqdxu1vvXHhwUQoTVTKHo5kXj2mo73EPzkWqiUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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