Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08bd31ad72e1da7c00b89e1ac5d3948db097e834c96bfc82d37469cf8b073c3b' 
  AND token = 'oSgi/ez+S5TRgzIg7ljnvDvOqHBbGFckDeNASW9O3bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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