Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7bec83b5d4dd2e652ab6d121b70a7e56296cac72b31874dc5f667c126068b77' 
  AND token = 'ZZlpUY+3uNkLPYkMC4r+pMZdKTJjACFLC39zRaO3sNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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