Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cffb8b551d8fbbde65a60828cbca4adc78497dd9216b387ff362f119a49fe527' 
  AND token = 'BpdyGACZqZIoCM9icYPF8Igm27Iqzm3n8P8q/Rb8vtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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