Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d5d47d21ee7da8d28e60334322d56dd338f86e06ad8d98da118195fa725a256' 
  AND token = '5hDRC47uM32rFarPFtB6I7U6GXxsYOfxfv+aSB2mD7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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