Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8380a23e53032a33dfc393786d8ee14b4a258ce1a83b56a56b0add665a0e2605' 
  AND token = 'xZdxDoOv2fGDSqgN/U76ygudnQ5MMkTX1ELBXiH12lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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