Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58bafae73a6d51f6766ce8687e522436d2f3921fc65ef6fbeab443e09c1a9036' 
  AND token = '7Ro2CMuf12RsKMuixbM3VjOpujHNTHJGCH23k8wCnLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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