Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8faf619e46fa9d0bc2db9d6942d094fbf967db930ace48e2b5e2d9d992b4a205' 
  AND token = 'jsymvnHDYONrw3TWoU/IRVP+yCEVHyotFOlNwVgFX9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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